CN102101480A - Track traffic lane changing equipment - Google Patents

Track traffic lane changing equipment Download PDF

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Publication number
CN102101480A
CN102101480A CN 201010518090 CN201010518090A CN102101480A CN 102101480 A CN102101480 A CN 102101480A CN 201010518090 CN201010518090 CN 201010518090 CN 201010518090 A CN201010518090 A CN 201010518090A CN 102101480 A CN102101480 A CN 102101480A
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China
Prior art keywords
thread
changing equipment
driver train
control system
traveling
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CN 201010518090
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CN102101480B (en
Inventor
朱志伟
袁亦竑
曾国锋
叶丰
张弛
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Tongji University
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Shanghai Maglev Transportation Engineering Technology Research Center
Shanghai Maglev Transportation Development Co Ltd
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Priority to CN 201010518090 priority Critical patent/CN102101480B/en
Publication of CN102101480A publication Critical patent/CN102101480A/en
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Abstract

The invention relates to track traffic lane changing equipment suitable for the whole lane changing of a multi-section marshalling vehicle, comprising a mobile bearing mechanism, a driving mechanism, travel mechanisms, a locking mechanism and a detection and control system. The mobile bearing mechanism is supported by a plurality of pivot points at which the travel mechanisms are arranged, all (or part) of the pivot points are provided with the driving mechanism and the locking mechanism, and the travel mechanisms and the driving mechanism are separately arranged. The invention can realize the lane changing function of the multi-section marshalling vehicle or the whole train, greatly improve the operation efficiency of the whole train and reduce the area of a shunting operation area and the radiation length of an auxiliary line so as to decrease engineering manufacture cost; the control system can ensure the synchronization of the travel mechanisms driven at the pivot points in the translation process of the lane changing equipment and keep the linear state of the whole travelling girder; the locking mechanism can ensure the line shapes of the in-place lane changing equipment and the adjacent track; and the travel mechanisms and the driving mechanism are separately arranged, the stress of axes is relatively simple and can not generate adverse effect on the use of racks and pinions.

Description

Track traffic thread-changing equipment
Technical field
The present invention relates to a kind of thread-changing equipment of track traffic industry, especially be applicable to the thread-changing equipment of more piece marshalling vehicle thread-changing.
Background technology
The urban railway magnetic suspension traffic can realize the train thread-changing with the track switch group when circuit main track, subordinate line, vehicle base shunting service.Low speed magnetic floating traffic track switch is long, therefore, is difficult to arrange the track switch group under the limited condition of available occupation of land.Traditional railway is taken up an area of for saving in vehicle manufacturing, maintenance occasion, with thread-changing equipment translation single-unit locomotive or single-unit passenger vehicle.Patent ZL 200720131780.9 has announced a kind of locomotive thread-changing equipment that makes things convenient for the single-unit locomotive in the test a plurality of track thread-changings in reservoir area, and this thread-changing equipment is made up of main body frame, gap bridge turnover panel assembly, walking assembly and control cabin; Thread-changing equipment moves to target track as requested, opens the gap bridge turnover panel during near target track, and docks with the target rail when stopping; Wheel is to synchronous rotation in the thread-changing equipment traveling process.200620161519.9 of patent ZL have announced a kind of thread-changing equipment that uses for single-unit locomotive, single-unit passenger vehicle when making or keep in repair, comprise steel frame, equipment such as bearing seat, motor, coupler, drop-gear box, transmission shaft and wheels; Behind the electric motor starting, wheel drives the visitor and repaiies the operation of thread-changing equipment steel frame, reaches and moves the car purpose.
For permutation car or more piece marshalling vehicle, can adopt the simple combination of a plurality of traditional railway locomotives (passenger vehicle) thread-changing equipment, main body frame, walking assembly etc. that to be every joint car be similar to locomotive thread-changing equipment by a cover are formed, trave lling girder or be girder steel, but this combination has the following disadvantages: unreliable connection the between the main body frame, walking assembly and control convenience configuration thereof are numerous and diverse, cause each walking wheel that synchronous rotation is difficult to realize, and cost are higher; Girder steel is less than normal because of rigidity, quality is light partially and train is longer to the actuation duration of beam body, can cause bigger vibration, and is all unfavorable to thread-changing equipment and vehicle life-span; And whole girder steel is bigger at the accumulative total temperature deformation of beam-ends, and is higher to beam end of body temperature release request; Simultaneously, train low speed by the time travel mechanism walking wheel coaxial with the gear of driver train, the vertical load of train during by thread-changing equipment causes damage to rack-and-gear, influences service life.
Summary of the invention
A kind of track traffic thread-changing equipment provided by the invention can be made occasions such as maintenance factory, vehicle maintenance base at main track, subordinate line, vehicle and provide thread-changing for multi-section vehicles or permutation train between many different tracks.
In order to achieve the above object, the invention provides a kind of track traffic thread-changing equipment, comprise mobile load carrier, driver train, running mechanism, lockout mechanism, detection and control system, under the control system effect, driver train and running mechanism are realized the synchronous translation of straight line of mobile load carrier (containing train on it), finish the translation thread-changing of more piece marshalling vehicle.
Described mobile load carrier is by some point supportings, and described each fulcrum place all is provided with running mechanism, and all or part fulcrum place is provided with driver train and lockout mechanism.
The mobile load carrier of each fulcrum keeps the higher synchronous precision in traversing process, to guarantee the safety of contained train.
The device that described mobile load carrier comprises some trave lling girders and uses with fixed beam.
When described trave lling girder is freely supported structure, be connected with the traveling crossbeam by bearing, bearing can discharge the temperature deformation of trave lling girder; When described trave lling girder was continuous structure, temperature deformation can discharge from running mechanism.
Described bindiny mechanism guarantees that the beam body is in thread-changing equipment translation process safe.
Described driver train comprises the driving crossbeam, also comprises gear, gear wheel shaft, traversing reducing motor and the tooth bar of supporting setting, and described gear wheel shaft passes the driving crossbeam, the one end links to each other with gear, the other end links to each other with traversing reducing motor, and tooth bar fixedly mounts on the ground, the wheel and rack engagement.
Described running mechanism comprises the traveling crossbeam, the walking wheel, traveling wheel shaft and the walking rails that also comprise supporting setting, crossbeam and traveling crossbeam connect by the bolt faciation, the traveling wheel shaft is installed on the traveling crossbeam by bearing seat, the traveling wheel shaft is captiveed joint with walking wheel, walking rails fixedly mounts on the ground, and walking wheel rolls along walking rails under external force, the parallel installation with tooth bar of walking rails.
Gear wheel shaft transmits the moment of torsion of traversing reducing motor, and the traveling wheel shaft is then born the weight of train and trave lling girder.Driver train and running mechanism branch are arranged, described driver train (2) is born the traversing effect of thread-changing equipment that drives, described running mechanism (3) is born the vertical load from vehicle, mobile load carrier, not only make the stressed simple of gear wheel shaft and traveling wheel shaft, not fragile, guarantee that also the vertical dynamic loads when train passes through does not influence the use of wheel and rack.
Described lockout mechanism comprises some vertical locked components, horizontal locked component and vertical locked component, respectively thread-changing equipment is vertically locked, laterally locks and vertically locking.
Vertical locked component, horizontal locked component and vertical locked component comprise locking pin seat, cylinder, lock pin case, lock pin bar and lock pin actuating device respectively.
Described detection is connected described driver train, lockout mechanism with the control system circuit, this detection and control system comprise some detecting elements that put in place that are separately positioned on the fulcrum place, with the position of monitoring lock pin and crossbeam, this detection and control system also comprise the control convenience that is installed in the control cabin.
When thread-changing equipment was in the lock state, the lock pin bar of each fulcrum inserted respective rollers, and the train car load walks on the thread-changing equipment, after treating that the train car load comes to a complete stop, detect and control system select target track, the lock pin actuating device starts, and drives the lock pin bar and extracts from cylinder.
After obtaining detecting the instruction with control system, the lock pin actuating device starts, give gear by gear wheel shaft with torque transfer, gear rolls to the target track direction along tooth bar, the driving crossbeam and the traveling crossbeam that are promoted by gear wheel shaft also move along the tooth bar direction, the traveling crossbeam promotes the traveling wheel shaft and rolls, and the walking wheel of captiveing joint with the traveling wheel shaft then rolls to the target location along walking rails.
After thread-changing equipment arrived the target location, detection and control system were controlled traversing reducing motor and are quit work, and the lock pin actuating device starts, and drove in the cylinder of lock pin bar insertion target location circuit; Circuit after the locking has good straight line linear, and thread-changing equipment can accurately dock with adjacent trapped orbit after arriving the target location.
Thread-changing equipment is between target track when mobile, and the sensor that is arranged on the traversing motor offers control system with information such as the actual speed of corresponding motor, positions, so that control system is carried out synchro control, can guarantee that therefore each fulcrum motor is with the speed running.
The present invention can be applicable to circuit main track, subordinate line, vehicle and makes maintenance factory, car depot, vehicle maintenance base (the comprehensive place that maintenances is provided, cleans, unload dirt, park for vehicle) etc. and require multi-section vehicles or permutation train to finish the occasion of corresponding operation or permutation commentaries on classics line on different tracks, (group) compares with track switch, there is following advantage in the present invention: one, reduce the cascade unit of the area and the auxiliary line in shunting service district; Two, allowing under the limited condition of occupation of land (as the urban area), thread-changing equipment is better than the applicability of track switch (group), and integrated cost is also low; Three, for the urban railway magnetic suspension traffic system, the length of track switch is longer, uses thread-changing equipment to take up an area of more than using track switch to save.
Description of drawings
Fig. 1 is an integral structure scheme drawing of the present invention.
Fig. 2 is a fulcrum structure scheme drawing of the present invention.
Fig. 3 is the load carrier that is applicable to the low speed magnetic floating traffic of the present invention.
Fig. 4 is the structural representation of driver train of the present invention and running mechanism.
Fig. 5 is the structural representation of lockout mechanism of the present invention.
Fig. 6 is the structural representation of the setting element that tests the speed of the present invention.
The specific embodiment
Following according to Fig. 1~Fig. 6, specify preferred embodiment of the present invention.
As shown in Figure 1, be a kind of track traffic thread-changing equipment provided by the invention, this thread-changing equipment comprises:
Mobile load carrier 1, driver train 2, running mechanism 3, lockout mechanism 4, detection and control system 5.
As shown in Figure 2, described mobile load carrier 1 is by some point supportings, and each fulcrum place is provided with running mechanism 3, driver train 2, lockout mechanism 4.
As shown in Figure 3, described mobile load carrier 1 comprises the device that some trave lling girder 1-1 and fixed beam are used, and the device that described fixed beam is used comprises the bearing 1-2 that is arranged on trave lling girder 1-1 bottom, also comprises block 1-3, and this block is arranged on the driver train 2.
Described trave lling girder 1-1 is a beams of concrete, and is freely supported structure.
Bearing 1-2 connects described trave lling girder 1-1 and driver train 2, and bearing 1-2 can discharge the temperature deformation of trave lling girder 1-1.
Block 1-3 guarantees that the beam body is in thread-changing equipment translation process safe.
As shown in Figure 4, described driver train 2 comprises driving crossbeam 2-1, also comprise gear 2-2, gear wheel shaft 2-3, traversing reducing motor 2-4 and tooth bar 2-5 that supporting number is provided with, described gear wheel shaft 2-3 passes and drives crossbeam 2-1, the one end links to each other with gear 2-2, the other end links to each other with traversing reducing motor 2-4, and tooth bar 2-5 fixedly mounts on the ground, gear 2-2 and tooth bar 2-5 engagement.
Described running mechanism 3 comprises traveling crossbeam 3-1, also comprise walking wheel 3-2, traveling wheel shaft 3-3 and walking rails 3-4 that supporting number is provided with, crossbeam 2-1 and traveling crossbeam 3-1 connect by the bolt faciation, traveling wheel shaft 3-3 is installed on the traveling crossbeam 3-1 by bearing seat, traveling wheel shaft 3-3 is captiveed joint with walking wheel 3-2, walking rails 3-4 fixedly mounts on the ground, and walking wheel 3-2 moves in walking rails 3-4.
Gear wheel shaft 2-3 transmits the moment of torsion of traversing reducing motor 2-4, traveling wheel shaft 3-3 then bears the weight of train and trave lling girder 1-1, gear 2-2 and walking wheel 3-2 branch are arranged, make that not only gear wheel shaft 2-3 and traveling wheel shaft 3-3's is stressed simple, not fragile, guarantee that also the vertical dynamic loads when train passes through does not influence the use of gear 2-2 and tooth bar 2-5.
As shown in Figure 5, the vertical locked component of described lockout mechanism 4, laterally locked component and vertically locked component comprise respectively be fixedly mounted on ground-surface locking pin seat 4-1, be arranged on cylinder 4-2 on the locking pin seat 4-1, be installed in lock pin case 4-3 in the middle of the crossbeam 3-1, pass lock pin case 4-3 lock pin bar 4-4, be arranged on the lock pin actuating device 4-5 on the lock pin bar 4-4, described lock pin actuating device 4-5 can adopt electrical motor or hydraulic actuating cylinder.
As shown in Figure 5 and Figure 6, described detection is connected described driver train 2 with control system 5 circuit, lockout mechanism 4, this detection and control system 5 comprise some detecting elements that put in place that are separately positioned on the fulcrum place, this detecting element that puts in place comprises the incremental encoder 5-2 that is separately positioned on the traversing reducing motor 2-4, be arranged on absolute value encoder 5-3 and the absolute value encoder 5-4 that is arranged on the lock pin actuating device 4-5 on the traversing reducing motor 2-4 output shaft, described incremental encoder 5-2 measures the rotating speed of traversing reducing motor 2-4, absolute value encoder 5-3 and 5-4 measure the position of driver train 2 and lockout mechanism 4 respectively, and the control convenience that is installed among the control cabin 5-1 comprises controller, frequency converter and operational computations machine.
When thread-changing equipment was in the lock state, the lock pin bar 4-4 of each fulcrum inserted respective rollers 4-2, and the train car load walks on the thread-changing equipment, after treating that the train car load comes to a complete stop, detect and control system 5 select target tracks, lock pin actuating device 4-5 starts, and drives lock pin bar 4-4 and extracts from cylinder 4-2.
After obtaining detecting the instruction with control system 5, traversing reducing motor 2-4 starts, give gear 2-2 by gear wheel shaft 2-3 with torque transfer, gear 2-2 rolls to the target track direction along tooth bar 2-5, the driving crossbeam 2-1 and the traveling crossbeam 3-1 that are promoted by gear wheel shaft 2-3 also move along the tooth bar direction, traveling crossbeam 3-1 promotes traveling wheel shaft 3-3 and rolls, and the walking wheel 3-2 of captiveing joint with traveling wheel shaft 3-3 then rolls to the target location along walking rails 3-4.
After thread-changing equipment arrived the target location, detection and the traversing reducing motor 2-4 of control system 5 controls quit work, and lock pin actuating device 4-5 starts, and drives lock pin bar 4-4 and inserts among the cylinder 4-2 of target location circuit.
After traversing reducing motor 2-4 quits work, if thread-changing equipment is the no show target location still, because lock pin bar 4-4 has enough rigidity, lock pin actuating device 4-5 also has enough power, trave lling girder 1-1 be can drive and target location and locking continued to move to, circuit after the locking has good straight line linear, and thread-changing equipment can accurately dock with adjacent trapped orbit 6 after arriving the target location.
Thread-changing equipment is between target track when mobile, and controller indicates each motor frequency conversion device that motor speed is adjusted according to the motor speed information that incremental encoder 5-1 and absolute value encoder 5-2 record, to realize the running of motor high-precise synchronization.
Trave lling girder 1-1 of the present invention also can adopt continuous concrete beam or continuous steel concrete connecting beam except that adopting freely-supported cement concrete or steel concrete connecting beam; Adopt the pattern of continuous beam, its temperature deformation can discharge on moving beam, except adopting beams of concrete and steel concrete connecting beam, also can adopt the girder steel that increases vibration reducing measure.
Driver train of the present invention can adopt form, linear motor driving form, fluid motor-driven form, chain drive or the steel rope of the traveling of direct drive bearing wheed to cooperate forms such as winch driving.
The present invention has the following advantages:
1, comparing the commentaries on classics line operation that traditional thread-changing equipment can only carry out the single-unit vehicle compares, the present invention can realize the function of more piece marshalling vehicle or the direct thread-changing of permutation train, improve the single-piece operating efficiency greatly, also satisfied the required key function requirement of magnetic floating traffic simultaneously.
2, be applicable to the multiple occasions that need the thread-changing of more piece marshalling vehicle such as main track, subordinate line, vehicle manufacturing maintenance factory, vehicle base.
3, comparing traditional track switch group changes linear formula, and the present invention can reduce the circuit floor area, thereby reduces project total cost.
4, trave lling girder adopts single supported beam, and temperature deformation just can discharge at each fulcrum.
5, the equal configuration driven of each fulcrum mechanism, running mechanism, lockout mechanism and the setting element that tests the speed, guarantee that not only each fulcrum of thread-changing equipment translation process drives the linear state of the synchronous and whole trave lling girder of running mechanism, also can guarantee thread-changing equipment the linear of back and adjacent orbit that put in place.
6, the traveling wheel shaft separates with gear wheel shaft, and axle stressed simple relatively can not have a negative impact to the use of rack-and-gear.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited to the appended claims.

Claims (14)

1. a track traffic thread-changing equipment is characterized in that, this thread-changing equipment comprises mobile load carrier (1), driver train (2), running mechanism (3), lockout mechanism (4), control system (5); Under control system (5) effect, driver train (2) and running mechanism (3) are realized the synchronous translation of straight line of mobile load carrier (1), finish the translation thread-changing of more piece marshalling vehicle.
2. thread-changing equipment as claimed in claim 1, it is characterized in that, described mobile load carrier (1) is by some point supportings, described each fulcrum place all is provided with running mechanism (3), all or part fulcrum place is provided with driver train (2) and lockout mechanism (4), the mobile load carrier of each fulcrum keeps in traversing process synchronously, to guarantee the safety of contained train.
3. thread-changing equipment according to claim 1 is characterized in that, described driver train (2) comprises and drives crossbeam (2-1), also comprises gear (2-2), gear wheel shaft (2-3), traversing reducing motor (2-4) and the tooth bar (2-5) of supporting setting;
Described gear wheel shaft (2-3) passes and drives crossbeam (2-1), and the one end links to each other with gear (2-2), and the other end links to each other with traversing reducing motor (2-4), and tooth bar (2-5) fixedly mounts on the ground, gear (2-2) and tooth bar (2-5) engagement.
4. thread-changing equipment as claimed in claim 1 is characterized in that, described running mechanism (3) comprises traveling crossbeam (3-1), also comprises walking wheel (3-2), traveling wheel shaft (3-3) and the walking rails (3-4) of supporting setting
Crossbeam (2-1) connects by the bolt faciation with traveling crossbeam (3-1), traveling wheel shaft (3-3) is installed on the traveling crossbeam (3-1) by bearing seat, traveling wheel shaft (3-3) is captiveed joint with walking wheel (3-2), walking rails (3-4) fixedly mounts on the ground, and walking wheel (3-2) moves in walking rails (3-4).
5. thread-changing equipment as claimed in claim 1, it is characterized in that, driver train (2) and running mechanism (3) branch are arranged, and described driver train (2) is born and driven the traversing effect of thread-changing equipment, and described running mechanism (3) is born the vertical load from vehicle, mobile load carrier.
6. thread-changing equipment as claimed in claim 1 is characterized in that, described lockout mechanism (4) comprises some vertical locked components, horizontal locked component and vertical locked component, respectively thread-changing equipment is vertically locked, laterally locks and vertically locking.
7. thread-changing equipment as claimed in claim 6, it is characterized in that described vertical locked component, horizontal locked component and vertical locked component comprise locking pin seat (4-1), cylinder (4-2), lock pin case (4-3), lock pin bar (4-4) and lock pin actuating device (4-5) respectively.
8. thread-changing equipment as claimed in claim 7 is characterized in that, described lock pin actuating device (4-5) can adopt electrical motor or hydraulic actuating cylinder.
9. thread-changing equipment as claimed in claim 1 is characterized in that, described mobile load carrier (1) comprises the device that some trave lling girders (1-1) and fixed beam are used.
10. thread-changing equipment as claimed in claim 9 is characterized in that, the device that described fixed beam is used comprises the bearing 1-2 that is arranged on trave lling girder 1-1 bottom, also comprises block 1-3, and this block is arranged on the driver train 2.
11. thread-changing equipment as claimed in claim 1 is characterized in that, described trave lling girder (1-1) is freely-supported or continuous beam, adopts beams of concrete or has increased the girder steel of vibration reducing measure.
12. thread-changing equipment as claimed in claim 11 is characterized in that, adopts the freely-supported pattern when adopting beams of concrete, adopts the continuous beam pattern when adopting girder steel.
13. thread-changing equipment as claimed in claim 1, it is characterized in that, described detection is connected described driver train (2), lockout mechanism (4) with control system (5) circuit, this detection and control system (5) comprise some detecting elements that put in place that are separately positioned on the fulcrum place, and this detection and control system (5) also comprise the control convenience that is installed in the control cabin (5-1).
14. thread-changing equipment as claimed in claim 1 is characterized in that, described driver train (2) adopts the form of direct drive bearing wheed traveling, perhaps linear motor driving form, perhaps fluid motor-driven form, perhaps chain drive, perhaps steel rope cooperates winch to drive.
CN 201010518090 2010-10-25 2010-10-25 Track traffic lane changing equipment Active CN102101480B (en)

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CN102101480B CN102101480B (en) 2013-01-30

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103991461A (en) * 2014-06-04 2014-08-20 中国中元国际工程有限公司 Magnetic levitation system traverse table
CN107571887A (en) * 2017-08-26 2018-01-12 张春民 Railway station solid car transferring system
CN109229145A (en) * 2017-07-10 2019-01-18 比亚迪股份有限公司 Track switch trolley synchronization detecting method and device
CN112590858A (en) * 2020-12-22 2021-04-02 同济大学 Integrated bottom plate device for magnetic-levitation train line changing equipment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919945A (en) * 1974-08-12 1975-11-18 Hisazuchi Kojyo Device for transferring railway cars sideways
CN2202078Y (en) * 1993-07-27 1995-06-28 李焕山 Train marshalling apparatus
CN2263611Y (en) * 1996-07-03 1997-10-01 铁道部建厂局勘测设计院工业工程分院 No-pit transfer table
CN2803846Y (en) * 2004-12-28 2006-08-09 大连华锐股份有限公司 Twin-car auto carrying platform
CN201172413Y (en) * 2007-12-21 2008-12-31 南车戚墅堰机车有限公司 Locomotive traverse table
CN101804820A (en) * 2010-03-29 2010-08-18 大连华锐股份有限公司 Large multi-vehicle transfer platform

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919945A (en) * 1974-08-12 1975-11-18 Hisazuchi Kojyo Device for transferring railway cars sideways
CN2202078Y (en) * 1993-07-27 1995-06-28 李焕山 Train marshalling apparatus
CN2263611Y (en) * 1996-07-03 1997-10-01 铁道部建厂局勘测设计院工业工程分院 No-pit transfer table
CN2803846Y (en) * 2004-12-28 2006-08-09 大连华锐股份有限公司 Twin-car auto carrying platform
CN201172413Y (en) * 2007-12-21 2008-12-31 南车戚墅堰机车有限公司 Locomotive traverse table
CN101804820A (en) * 2010-03-29 2010-08-18 大连华锐股份有限公司 Large multi-vehicle transfer platform

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103991461A (en) * 2014-06-04 2014-08-20 中国中元国际工程有限公司 Magnetic levitation system traverse table
CN109229145A (en) * 2017-07-10 2019-01-18 比亚迪股份有限公司 Track switch trolley synchronization detecting method and device
CN107571887A (en) * 2017-08-26 2018-01-12 张春民 Railway station solid car transferring system
CN107571887B (en) * 2017-08-26 2024-02-13 兰州交通大学 Railway station three-dimensional shunting system
CN112590858A (en) * 2020-12-22 2021-04-02 同济大学 Integrated bottom plate device for magnetic-levitation train line changing equipment
CN112590858B (en) * 2020-12-22 2021-10-08 同济大学 Integrated bottom plate device for magnetic-levitation train line changing equipment

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